linux-kernel - [09/15] gpio/pca953x: Fix warning of enabled interrupts in handler

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Date:	Thu, 16 Feb 2012 16:55:18 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, David Jander <david@...tonic.nl>,
	Grant Likely <grant.likely@...retlab.ca>,
	Steven Rostedt <rostedt@...dmis.org>,
	Yong Zhang <yong.zhang0@...il.com>,
	Manfred Gruber <m.gruber@...erspurt.at>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [09/15] gpio/pca953x: Fix warning of enabled interrupts in handler

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Jander <david@...tonic.nl>

commit 6dd599f8af0166805951f4421a78ba716d78321a upstream.

When using nested threaded irqs, use handle_nested_irq(). This function
does not call the chip handler, so no handler is set.

Signed-off-by: David Jander <david@...tonic.nl>
Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Yong Zhang <yong.zhang0@...il.com>
Cc: Manfred Gruber <m.gruber@...erspurt.at>
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpio/pca953x.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/gpio/pca953x.c
+++ b/drivers/gpio/pca953x.c
@@ -437,7 +437,7 @@ static irqreturn_t pca953x_irq_handler(i
 
 	do {
 		level = __ffs(pending);
-		generic_handle_irq(level + chip->irq_base);
+		handle_nested_irq(level + chip->irq_base);
 
 		pending &= ~(1 << level);
 	} while (pending);
@@ -481,8 +481,8 @@ static int pca953x_irq_setup(struct pca9
 			int irq = lvl + chip->irq_base;
 
 			irq_set_chip_data(irq, chip);
-			irq_set_chip_and_handler(irq, &pca953x_irq_chip,
-						 handle_simple_irq);
+			irq_set_chip(irq, &pca953x_irq_chip);
+			irq_set_nested_thread(irq, true);
 #ifdef CONFIG_ARM
 			set_irq_flags(irq, IRQF_VALID);
 #else


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